Malicious PDF — malware analysis report

Static analysis result for SHA-256 031fd95b60fff07e…

MALICIOUS

PDF

42.1 KB Created: 2021-05-24 02:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: beebb645ba49d4e13b5cf88843d1dd68 SHA-1: 16c0e1407fb81ef898146df00ef45da68baba9b9 SHA-256: 031fd95b60fff07e9dd0160256a1bf592812bfbcf8c90571c8c172abac2ff69c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary malicious URL is https://netcdn.xyz/app/406889139/haktuts-coin-master-free-daily-spins-game-hack, which is presented as a 'free generator' for a game. The document body also contains a call to action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR'. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8161

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/haktuts-coin-master-free-daily-spins-game-hack In PDF document text
    • http://arpinoturismo.it/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AE 24844 bytes
SHA-256: 438a82c552c53e86f2a35b38b08a88ce09ccc44f9a7887501b5f5978001b7329
font_01_sfnt_off00006a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 3620 bytes
SHA-256: d859fd77b85f3b3415639a87e8809ecf698e2c52ea4a2633c07d9e96259cae8a
font_02_sfnt_off00007761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7761 18620 bytes
SHA-256: ded7de44f7a870837d4ef416985ae0b9ef78dce3540f45b1558d033e63b05ca7
font_03_sfnt_off00009a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A42 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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